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This paper presents analytical and numerical conformal mapping (CM) to analyze magnetic fields originating from permanent magnets and armature winding currents in a slotted air-gap of a surface mounted radial permanent-magnet synchronous motor (SPM), taking into account the effect of arbitrarily curved motor surfaces. We also studied the slotless configuration of the external rotor permanent-magnet...
In this paper, electromagnetic vibration of interior permanent magnet (IPM) brushless motors under BLDC and BLAC operation mode is investigated. The electromagnetic field is calculated by 2D finite element analysis (FEA). The radial and tangential force distribution on the stator is also derived, and input to the structure transient finite element model. The corresponding vibration spectrum is predicted...
Three dimension finite element model (3D-FEM) of the spherical motor is presented in this paper. By analysis of one pair of stator-rotor poles, nonlinear regression model of one pair of stator-rotor poles based on the support vector machine (SVM) is introduced. Parameters optimization of one pair of stator-rotor poles for the maximal torque is also introduced which is based on chaos and uses the SVM...
This paper presents the analytical study, finite element model, and experimental tests on a three-phase surface-mounted permanent magnet (SPM) synchronous motor designed for the wheel of a hybrid vehicle. The paper focuses on the machine design process so as to achieve the maximum torque-to-current and torque-to-volume ratio. Combining finite element simulations and analytical model, the final solution...
Detent force is a typical drawback of Linear Permanent Magnet (PM) machines, particularly when accurate positioning or constant low speed is required. This kind of motor presents cogging force, force weakening on the transition areas, and saturation. This paper analyzes and improves a resonant controller in the force-current control loop to improve it's behaviors. A force model obtained from Finite...
A model of the IPMSM with magnetic saturation is presented. The model is based on flux linkage data from a finite element model where the anhysteretic BH curve is included in the material properties of the stator and rotor. The simulated flux linkage data are used in a modified IPMSM dq model using two look up tables. Using the modified IPMSM model with the flux linkage data, simulation results are...
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